The clock in my motometer is toast. Ed had a spare but that one's junk too. We tried to clean the corrosion on the circuit board, but it's so small and fine we didn't get any results.
The clock is a simple separate module once you open the cluster. It is listed as a separate part on real OEM (62111459368)... but for $225! :mbird WTF it's a cheapo digital clock, the kind you can now get for $2 at a dollar store. I grant they would have been a little pricier in 1986, but even so...
Seems they go bad a lot, so before searching for used ones (which might have the same issue), does anyone know if that clock was used in other things besides Ks or might be available elsewhere? It was definitely used up to the K1100s.